This $110M Construction Manager-at-Risk (CMAR) project was awarded to MWH by the North Texas Municipal Water District. It consists of four phases and requires the coordination of three separate design teams (Jacobs, Carollo, and HDR).
In late 2021, MWH began structural and mechanical improvements at the Wylie Water Treatment Plant in addition to converting the facility’s current treatment process to a biologically active filtration (BAF) process. BAF is an advanced water treatment process that provides numerous advantages, from improved natural organic matter removal to reduced disinfection byproduct formation. Not only does BAF reduce tastes and odors, but it also mitigates regrowth issues, facilitating better water quality for the community years to come.
The project’s structural and mechanical improvements includes the replacement of roofs and overflow structures for two 240-foot diameter concrete clearwells; constructing magnetic flow meter vaults, new water pumps, and a calcium thiosulfate system; and installing large diameter pipes and valves. Since the summer of 2022, our team has completed the clearwell roof slab placement in addition to the two concrete meter vaults and 550 LF of chemical trench.
BAF improvements are currently underway, including installation of large-diameter underground piping and valves, splitter structures, chlorine contact basins, and clearwells. The project is currently on track to achieve final completion in 2025.
2024 marks the ten-year anniversary of the completion of the Tres Ríos Water Reclamation Facility (WRF) Project. Operating as the construction-manager-at-risk on this $232 million Pima County project, MWH Constructors enhanced the plant’s capacity from 37.5 MGD to 50 MGD, transforming an outdated facility (built in 1977) into a modern wastewater plant. The upgrade and expansion of the Tres Ríos WRF provided the highest quality effluent, classified as A+ reuse, equipped with state-of-the-art technology, automation, and process controls. This streamlined operational efficiencies and increased water availability for the residents of Pima County, Arizona.
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MWH is continuing to work uninterrupted on the Biosolids Digester Facilities Project (BDFP). The long-term, largescale project represents a significant overhaul of the Southeast Treatment Plant, San Francisco’s largest wastewater pollution treatment plant. BDFP is set to redefine the way wastewater is treated in the city, aiming to process up to 800 million gallons per day (MGD) and serving about 80% of the city’s population. Implementing state-of-the-art technologies and innovation, the project underscores MWH’s commitment to environmental sustainability and urban rejuvenation. The revamped plant will set new standards in waste management and pollution control, marking a major milestone in San Francisco’s environmental management history.
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The Biosolids Digester Facilities Project (BDFP) project is transcending the conventional boundaries of construction and industrial development. At its core, it’s a story of revitalizing the Bayview-Hunters Point district, a historically underserved community, through innovative apprenticeship programs, local business collaborations, and a profound commitment to community integration. The initiative’s impact extends well beyond revamping infrastructure to San Francisco’s largest wastewater treatment plant facility to people and placemaking.
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